REPORT FOR 2019 DATA
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Our Drinking Water is Safe! The City of Southlake’s goal is to provide you with safe and reliable drinking water. We are happy to report that our water meets the safe drinking water quality standards as set by the U.S. Environmental Protection Agency (EPA) and the Texas Commission on Environmental Quality (TCEQ). This report is a summary of the quality of the water we provided to you in 2019.
3 A Guide to Your Water Quality 4 How to Read Your Water Quality Report Data 5 Southlake’s Water Source; Water Loss 6 Microorganisms; Lead & Copper Testing; Corrosion Control 7 Regulated Contaminants 8 Regulated Contaminants – Continued 9 Funny Taste or Smell?; Secondary Constituents 10 Unregulated Contaminant Monitoring in 2019 11 Unregulated Contaminant Monitoring in 2019 – Continued 12 Lead & Copper Rule Updates; AWIA Requirements 13 Ask the Water Supervisor 14 Defend Your Drains 15 Let’s Talk About It; Eye on Water
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CITY OF SOUTHLAKE | WATER QUALITY REPORT 2020
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A Guide to Your Water Quality This report is a summary of the quality of water we provided to our customers in 2019. Data found in the following pages was obtained from sampling protocols, as defined by the Environmental Protection Agency (EPA).
Definitions and Abbreviations Action Level: The concentration of a contaminant, which, if exceeded, triggers treatment or other requirements that a water system must follow. Level 1 Assessment: A Level 1 assessment is a study of the water system to identify potential problems and determine (if possible) why total coliform bacteria were found.
There is evidence that addition of a disinfectant is necessary for control of microbial contaminants. MRDLG: Maximum Residual Disinfectant Level Goal; the level of a drinking water disinfectant below which there are no known or expected health risks. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
Level 2 Assessment: A Level 2 assessment is a very detailed study of the water system to identify potential problems and determine (if possible) why an Escherichia coli (E. coli) maximum contaminant level (MCL) violation has occurred and/or why total coliform bacteria were found on multiple occasions.
MRL: Minimum Reporting Level; the lowest concentration of a constituent or a contaminant that can be measured by a laboratory.
MCL: Maximum Contaminant Level; the highest level of a contaminant allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
NTU: Nepholomeric Turbidity Units; a measure of water turbidity or clarity.
MCLG: Maximum Contaminant Level Goal; the level of a contaminant in drinking water below which there is no known or expected health risks. MCLGs allow for a margin of safety. MRDL: Maximum Residual Disinfectant Level; the highest level of disinfectant allowed in drinking water.
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N/A: Data field not applicable to the particular constituent we are reporting information about.
pCi/L: Picocuries per Liter; a measure of radioactivity. ppb: Parts per Billion or micrograms per liter (Âľg/L). ppm: Parts per Million or milligrams per liter (mg/L). TT: Treatment Technique; a required process intended to reduce the level of a contaminant in drinking water.
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The City of Southlake monitors water quality daily, including sampling, fire hydrant flushing, and checking chlorine residuals.
View the report online here:
CityofSouthlake.com/WaterQuality
How to Read Your Water Quality Report This Consumer Confidence Report is a summary of the constituents that are in your drinking water and how these constituents may affect your health, if found in excess of safe drinking water quality standards. This quick reference may help you to better understand the information provided in the rest of this report. The amount, from lowest to highest, of this contaminant detected in our drinking water this year. Parts per million is equal
to one teaspoon in 1,302 gallons.
Contaminant
Measure
2019 Level
Range of Detects
The highest amount of a contaminant EPA allows in drinking water.
MCL
Below this level, a contaminant has no known or expected health risks.
MCLG
Common Source of Substance
Substance 1
ppm
0.5
0.02-0.11
2
2
Discharge from drilling wastes, discharge from metal refineries
Substance 2
ppb
8.4
2.4-8.4
100
100
Erosion of natural deposits
Parts per billion is equal to one teaspoon in 1,302,000 gallons.
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The average amount of this contaminant detected in our drinking water this year.
This describes some of the ways contaminants enter drinking water; wording is provided by EPA and may or may not apply to the City of Southlake.
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Southlake’s Water Source The City of Southlake gets all of its water from the City of Fort Worth’s Water Department. Fort Worth obtains water from surface water sources: Lake Worth, Eagle Mountain Lake, Lake Bridgeport, Richland Chambers Reservoir, Cedar Creek Reservoir, and the Clear Fork Trinity River (from Lake Benbrook). Fort Worth owns Lake Worth. The U.S. Army Corp of Engineers is responsible for Lake Benbrook. The other four lakes are owned and operated by Tarrant Regional Water District (TRWD).
TCEQ ASSESSES RAW WATER SUPPLIES The Texas Commission on Environmental Quality (TCEQ) completed an assessment of Fort Worth’s, and subsequently, Southlake’s source waters. TCEQ classified the risk to our source waters as high for most contaminants. High susceptibility means there are activities near the source water watershed that make it very likely chemical constituents may come into contact with the source water. It does not mean there are any health risks present. TRWD, from which the Southlake ultimately purchases its water, received assessment reports. For more information on source water assessments and protections efforts at our system contact Southlake Water Utilities at 817-748-8082. Further details about the source water assessments are available at www.tceq.texas.gov/gis/swaview.
Further details about sources and source water assessments are available through the Texas Commission on Environmental Quality at www.tceq.texas.gov/drinkingwater.
Water Loss, as Reported to the Texas Water Development Board Every year the City of Southlake is required to report water loss to the Texas Water Development Board (TWDB). This is non-metered water used in fire hydrant protection, water line flushing for health and safety, and other activities. Water loss also includes water lost to leaks, line breaks, and other uncontrollable flow. We reported a loss of approximately 11 gallons per water account in 2019. One of the most important tools in accurately measuring water loss and ensuring accurate utility billing is the water meters throughout the City. The large production meters that measure the incoming water purchased from the City of Fort Worth are tested and calibrated at least once per year. The Southlake Water Utilities’ goal is to conform to the American Water Works Association (AWWA) meter accuracy standard of 98.5% to 101.5%.
Trinity River Authority of Texas Tarrant Water Supply Project In accordance with the requirements of §290.272. Content of the Report. (g)(6) “Systems that use an interconnect or emergency source to augment the drinking water supply during the calendar year of the report must provide the source of the water, the length of time used, an explanation of why it was used, and whom to call for the water quality information.” The Trinity River Authority of Texas-Tarrant Water Supply Project supplied water to Fort Worth through an emergency interconnection. The water was supplied from Jan. 15 through Jan. 18 and Feb. 26 through Feb. 28, as repayment for water supplied to TRA in a previous year for a pipeline rupture.
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Microorganism Testing Shows Low Detections in Raw Water Tarrant Regional Water District monitors the raw water at all intake sites for Cryptosporidium, Giardia lamblia and viruses. The source is human and animal fecal waste in the watershed. The 2019 sampling showed low level detections of Cryptosporidium, Giardia lamblia and viruses in some but not all of the water supply sources. Viruses are treated through disinfection processes. Cryptosporidium and Giardia Lamblia are removed through disinfection and/or filtration.
Viruses are treated through disinfection processes. Cryptosporidium and Giardia Lamblia are removed through disinfection and/or filtration.
You may be more vulnerable than the general population to certain microbial contaminants, such as Cryptosporidium, in drinking water. Infants, some elderly, or immuno-compromised persons such as those undergoing chemotherapy for cancer; those who have undergone organ transplants; those who are undergoing treatment with steroids; and people with HIV/AIDS or other immune system disorders can be particularly at risk from infections. You should seek advice about drinking water from your physician or health care provider. Additional guidelines on appropriate ways to lessen the risk of infection by Cryptosporidium are available from the Safe Drinking Water Hotline.
Lead and Copper Testing If present, elevated levels of lead can lead to serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and private plumbing. The City of Southlake is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. If you haven’t turned on any faucets in several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to two minutes before using the water for drinking or cooking. Never use hot water from the tap for cooking or preparing infant formula. Measure
Action Level
90th Percentile
# Sites Over Action Level
MCLG
Violation
Common Source of Substance
Copper
ppm
1.3
0.86
0
1.3
No
Erosion of natural deposits; leaching from wood preservatives; corrosion of household plumbing systems
Lead
ppb
15
3.3
1
0
No
Corrosion of household plumbing systems; erosion of natural deposits
Contaminant
If you are concerned about lead in your water, you may request to have your water tested through the City of Southlake Public Works Department. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline 1-800-426-4791 or at www.epa.gov/safewater/lead.
Corrosion Control To meet the requirements of the Lead and Copper Rule, Fort Worth achieves corrosion control through pH adjustment.
The City of Southlake has four water towers (called elevated storage tanks) and two pump stations (ground storage tanks). Have you spotted them all?
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D can a le ho Ch th
a h
Did you know you can sign up for a free account that will let you view your hourly water usage? Check out page 15 of this report for more information.
Regulated Contaminants Tested in 2019 Measure
2019 Level
MCL
MCLG
Violation
Common Source of Substance
NTU
0.5 99.9%
TT = 1 (TT = lowest monthly % of samples ≤ 0.3 NTU)
N/A
No
Soil runoff (Turbidity is a measure of the cloudiness of water. It is an indicator of the effectiveness of the filtration system.)
Measure
2019 Level
Range of Detects
MRDL
MRDLG
Violation
Common Source of Substance
ppm
2.54
0.7-3.7
4
4
No
Water additive used to control microbes
Measure
2019 Level
Range of Detects
MCL
MCLG
Violation
Common Source of Substance
Bromate
ppb
4.35
0-14.8
10
0
No
By-product of drinking water disinfection
Haloacetic Acids (HAA5)
ppb
9.08
6.60-12.30
60
N/A
No
By-product of drinking water disinfection
Total Trihalomethanes
ppb
8.44
3.51-18.40
80
N/A
No
By-product of drinking water disinfection
Contaminant
MCL
MCLG
High
Low
Average
Violation
Common Source of Substance
TT = % removal
N/A
1
1
1
No
Naturally occurring
Contaminant
Turbidity
Contaminant Chloramines
Contaminant
Total Organic Carbon
Contaminant
Coliforms
Highest # of Positives
Total # of Positives of Fecal Coliform or E. coli Samples
Total Coliform MCL
Total Coliform MCLG
Fecal Coliform or E. coli MCLG
Violation
Likely Source of Contamination
2
0
No more than 5% of monthly samples collected test positive.
0
0
No
Naturally present in the environment
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Regulated Contaminants Tested in 2019 Contaminant
Measure
2019 Level
Range of Detects
MCL
MCLG
Violation
Common Source of Substance
Beta particles and photon emitters
pCi/L
5.6
4.4-5.6
50
0
No
Decay of natural and man-made deposits of certain minerals that are radioactive and may emit forms of radiation known as photons and beta radiation
Combined Radium
pCi/L
2.5
N/A
5
0
No
Erosion of natural deposits
Uranium
ppb
1.1
0-1.1
30
0
No
Erosion of natural deposits
Arsenic
ppb
1.5
0-1.5
10
0
No
Erosion of natural deposits; runoff from orchards; runoff from glass and electronics production wastes
Atrazine
ppb
0.1
0-0.1
3
3
No
Runoff from herbicide used on row crops
Barium
ppm
0.06
0.05-0.06
2
2
No
Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits
Cyanide
ppb
126
74.8 to 126
200
200
No
Discharge from plastic and fertilizer factories; discharge from steel and metal factories
No
Water additive to promote strong teeth; erosion of natural deposits; discharge from fertilizer and aluminum factories
Fluoride
ppm
0.54
0.15-0.54
4
4
Nitrate (measured as Nitrogen)
ppm
10
0.18-0.58
10
10
No
Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
Nitrite (measured as Nitrogen)
ppm
1
0.01-0.02
1
1
No
Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
The average Southlake resident used 175 gallons of water per day in 2019.
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Funny Taste or Smell? Occasionally, water suppliers experience episodes of unpleasant odors and tastes in the water, often characterized as “earthy” or “musty.” These taste and odor variations are caused by naturally-occurring algae growth in one source of your drinking water, such as Eagle Mountain Lake. The compounds that cause this particular taste and smell do not pose any health risks. Other constituents, which are often found in drinking water, can also cause taste, color, and odor. These secondary constituents are not causes for health concern. We report information about these secondary constituents to help you in making a determination about the taste, odor and appearance of your water. These items do not relate to public health but rather to the aesthetic effects. These items are often important to industry.
Item
Measure
Your Water
Bicarbonate
ppm
128 to 1449
Calcium
ppm
42.4 to 60.7
Chloride
ppm
19.5 to 35.1
µmhos/ cm
403 to 482
pH
units
8.1 to 8.4
Magnesium
ppm
4.64 to 8.30
Sodium
ppm
15.1 to 26.8
Sulfate
ppm
23.4 to 44.3
Total Alkalinity as CaCo3
ppm
128 to 150
Total Dissolved Solids
ppm
192 to 266
Total Hardness as CaCo3
ppm
138 to 178
Total Hardness in Grains
grains/ gallon
8 to 10
Conductivity
One out of every 20 Southlake residents has a water leak at their home.
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Unregulated Contaminant Monitoring in 2019 Unregulated contaminants are those for which the EPA has not established drinking water standards. The purpose of unregulated contaminant monitoring is to assist the EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulation is warranted. Because these contaminants are not regulated there is not a Maximum Contaminant Level or Maximum Contaminant Level Goal. Fort Worth’s testing detected only four of the 30 compounds included in the fourth round of unregulated contaminant monitoring. The detections were one metal and the three haloacetic acid disinfection byproduct groups. Measure
Average
Range of Detects
Common Source of Substance
Manganese
ppb
0.93
0.4 to 4.19
Naturally occurring; used in drinking water and waste-water treatment; used in steel production, fertilizer, batteries, and fireworks
HAA5
ppb
3.94
1.27 to 5.11
HAA6Br
ppb
3.16
1.71 to 4.05
HAA9
ppb
6.26
2.98 to 7.47
Compound
By-product of drinking water disinfection
HALOACETIC ACID GROUPS This table includes all of the compounds that comprise each of the haloacetic acid groups. Compounds that are not detected are usually not listed in the charts in this report; however, those undetected are listed below to provide complete information on the compounds that comprise each of the three groups in the table above. Measure
Average
Range of Detects
HAA5
Dibromoacetic Acid
ppb
3.10
1.27 to 4.91
HAA5
HAA9
Monochloroacetic Acid
ppb
0
0 to 0
HAA5
HAA9
Trichloroacetic Acid
ppb
0.0
0 to 0
HAA5
HAA9
Monobromoacetic Acid
ppb
0
0 to 0
HAA5
HAABr6
HAA9
Dibromoacetic Acid
ppb
0.84
1 to 1.75
HAA5
HAABr6
HAA9
Bromochloroacetic Acid
ppb
2.32
1.71 to 2.76
HAABr6
HAA9
Bromodichloroacetic Acid
ppb
0
0 to 0
HAABr6
HAA9
Chlorodibromoacetic Acid
ppb
0
0 to 0
HAABr6
HAA9
Tribromoacetic Acid
ppb
0
0 to 0
HAABr6
HAA9
Compound
HAABR6
HAA9
Common Source of Substance
By-product of drinking water disinfection; not regulated individually; included in Haloacetic Acids
EPA gathers data to decide if future regulation is necessary Water utilities in the United States monitor for more than 100 contaminants and must meet 91 regulations for water safety and quality. Should other contaminants be regulated? The 1996 Safe Drinking Water Act amendments require that once every five years EPA issue a new list of up to
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30 unregulated contaminants to be monitored by public water systems. Unregulated contaminants are those for which EPA has not established drinking water standards. The purpose of unregulated contaminant monitoring is to assist EPA in determining the occurrence of unregulated contaminants
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The City of Southlake maintains 11,064 meters, 7663 valves, and 2,809 fire hydrants, plus over 300 miles of water line pipes.
Unregulated Contaminant Monitoring in 2019 Measure
MRDL
MRDLG
Your Water
Range of Detects
Chloral Hydrate
ppb
Not regulated
N/A
0.33
0.23 to 0.43
Bromoform
ppb
Not regulated
0.0
1.07
1.02 to 4.09
Bromodichloromethane
ppb
Not regulated
0.0
3.97
1.12 to 8.94
Chloroform
ppb
Not regulated
70
3.68
1.32 to 8.11
Dibromochloromethane
ppb
Not regulated
60
3.68
1.01 to 10.4
Dibromoacetic Acid
ppb
Not regulated
N/A
1.41
1 to 3.2
Dichloroacetic Acid
ppb
Not regulated
0.0
4.78
2.4 to 9.2
Monobromoacetic Acid
ppb
Not regulated
N/A
0.02
1 to 1
Monochloroacetic Acid
ppb
Not regulated
70
0.61
1 to 2.5
Trichloroacetic Acid
ppb
Not regulated
20
0.09
1 to 2
Contaminant
in drinking water and whether future regulation is warranted. The fourth Unregulated Contaminant Monitoring Rule includes assessment for three brominated haloacetic acid groups, 10 cyanotoxins, two metals, three semi-volatile chemicals, three alcohols, eight pesticides and one pesticide manufacturing byproduct. The rule requires testing for cyanotoxins in four consecutive months. Fort Worth tested from August
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Common Source of Substance By-product of drinking water disinfection By-product of drinking water disinfection; not regulated individually; included in Total Trihalomethanes
By-product of drinking water disinfection; not regulated individually; included in Haloacetic Acids
through November 2018. As required by the rule, testing for the other compounds is done over four consectutive quarters. Fort Worth’s testing period is from June 2018 through March 2019. The results shown are for the final quarter of sampling, which occurred from January 2019 to February 2019. Additional Information: www.epa.gov/dwucmr
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Looking Forward: Water System Regulations THE CITY OF SOUTHLAKE MUST FOLLOW REGULATIONS PUT IN PLACE BY THE TEXAS COMMISSION ON ENVIRONMENTAL QUALITY (TCEQ) AND THE ENVIRONMENTAL PROTECTION AGENCY (EPA). TWO NEW REGULATIONS WILL BE IMPLEMENTED IN THE NEXT FEW YEARS.
America’s Water Infrastructure Act of 2018 The America’s Water Infrastructure Act (AWIA) of 2018 requires Southlake to complete a Risk and Resilience Assessment for our water system by June 2021. This assessment will look at Southlake’s ability to withstand natural hazards, like tornados or flooding, and malevolent acts, like bioterrorism. This assessment will analyze the City’s water infrastructure, security systems, monitoring practices, financial systems, and basic operations. After the assessment has been completed, Southlake will create an Emergency Response Plan with procedures, strategies, and action planned to address issues identified in the Risk and Resilience Assessment.
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Lead and Copper Rule The EPA is expected to finalize revisions to the current Lead and Copper Rule. Currently, the City of Southlake monitors a percentage of households for lead and copper every year. The expected revisions may mean the City will begin a lead service line inventory for all water customers, increased sampling at residences, schools, and childcare facilities, and additional public outreach about the effects of lead in drinking water. Because most homes and infrastructure in Southlake is relatively new, we do not see high levels of lead in our drinking water and always meet drinking water standards. If you have questions about lead or copper in drinking water, you can always call us at 817-748-8082.
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Ask the Water Supervisor KYLE FLANAGAN Kyle Flanagan, City of Southlake Water Supervisor, has worked for the City of Southlake for 21 years and has been the Water Supervisor for 12 years. He’s here to answer some common questions we receive from the Southlake community.
What makes you proud to work in the water industry? “I get the most satisfaction knowing we are delivering the best product possible that is safe and at a fair cost to our customers using new techniques and technologies. Couple that with having the most qualified, dedicated team and we have a winning combination.”
Why are fire hydrants sometimes left running? “It is important to know that water has a shelf life, much like milk. Water quality can degrade over time if it remains in storage tanks and pipelines too long. We constantly sample water quality throughout our water distribution system. This sampling, coupled with the use of historical water use patterns and other behind-the-scenes monitoring allows us to take proactive measures to ensure you receive safe, drinkable water. As such, you will see a typically see a hydrant left on during the winter months when water demand is low to ensure the water is fresh in that area.”
Why is my water cloudy or milky sometimes? “While this is not typical, it can happen occasionally. Cloudy water is an indication of air being trapped in the pipes. This usually occurs when there is a service disruption in the area, such as a water main break or having
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your meter replaced. Water personnel are trained to remove the air trapped in pipes as much as possible before leaving the jobsite. Give us a call if you experience cloudy water, so we can help.”
Why is my water bill so high? “While there is not just one right answer for this, the most common cause of high-water bills can be attributed to sprinkler systems. Another common cause includes larger leaks that significantly impact a water bill, but can usually be found easily. Sprinkler systems typically use anywhere from 15-25 gallons per minute (gpm) depending on the size of the zone and size of the sprinkler heads. So even if you had a zone that consumed only 15gpm and ran that zone for 1 hour, you’d consume 900 gallons just in one hour of watering. You can easily see how a water bill can significantly increase before you ever use a drop in the home. The City also has tiered billing rate that may impact your water bill. We offer many services and programs for customers to help identify and fix leaks to keep those bills in check. Give us a call to learn more!
What can I do if I think my water is unsafe to drink? “If you ever have a question or concern whether your water is safe to drink, please call us. We closely monitor the water quality here in Southlake. Our number is 817-748-8082.”
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Not sure where to drop off your medicines, paint, pesticides, cleaning products, or cooking oil? Visit www.defendyourdrainsnorthtexas.org to ďŹ nd drop off locations and other useful resources about properly disposing of items. The City of Southlake also partners with the Fort Worth Environmental Collections Center to help you manage household hazardous waste. Call (817) 392-1234 to learn more about how you can take advantage of this program.
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ARE YOU IN THE KNOW? In 2016, the City of Southlake Public Works Department updated every water meter in Southlake with cellular technology that allows you to view your daily water use right on your phone, tablet, or computer. You can even set leak alerts so you can address any problems immediately and not be surprised by a large bill at the end of the month.
Sign up for your EyeOnWater account! https://southlaketx.eyeonwater.com
Let’s Talk About It The information in this report represents a high-level review of our City’s water. For additional information please contact the City of Southlake Public Works Department at 817-748-8082.
To participate in decisions concerning water you may attend City of Southlake Council meetings. Please call 817-748-8183 or visit www.cityofsouthlake.com for more information regarding meeting times and dates.
Additional copies of the Water Quality Report are available in the Public Works Department offices at Town Hall, located at 1400 Main Street or at Public Works Operations, located at 1950 E. Continental Blvd.
If you have any questions concerning the CCR, please call the Drinking Water Quality Team at 512-239-4691 or email PWSCCR@tceq.texas.gov. When you contact the TCEQ please make sure that you reference the City of Southlake, ID #2200075.
En Español
Give Us a Call
Este informe incluye información importante sobre el agua potable. Si tiene preguntas o comentarios sobre éste informe en español, por favor de llamar al tel. 817-748-8082 para hablar con una persona bilingüe en español.
Customer Service
817-748-8051
New Service/Billing Questions/Meter Leaks
Operations
Water Quality Inquiries/Main Breaks/ Sewer Concerns/Environmental Concerns
817-748-8082
Visit us online at: www.cityofsouthlake.com WATER QUALITY REPORT 2020 | CITY OF SOUTHLAKE
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1950 E Continental Blvd Southlake, TX 76092
POSTAL PATRON
PERMIT 55 ERCWSS
PRESORTED STANDARD US POSTAGE PAID SOUTHLAKE, TX
